Require replace: true for file.export_session_text to overwrite

Fixes #929

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/file.rs

@@ -110,9 +110,10 @@ pub fn specs() -> Vec<CommandSpec> {
             crate::io::write_file(&path, &bytes)?;
             Ok(json!({"path": path, "bytes": bytes.len()}))
         }),
-        cmd!(noundo "file.export_session_text", "Session Info as Text...", ["File", "Export"], None, "{path?}", always, |e, p| {
+        cmd!(noundo "file.export_session_text", "Session Info as Text...", ["File", "Export"], None, "{path?, replace?: false}", always, |e, p| {
             let text = crate::inspect::session_text(e);
             if let Some(path) = str_param(p, "path") {
+                refuse_replacing(e, "file.export_session_text", std::path::Path::new(path), p)?;
                 crate::io::write_file(path, text.as_bytes())?;
             }
             Ok(json!({"text": text}))
@@ -350,6 +351,24 @@ mod tests {
         path.to_string_lossy().into_owned()
     }
 
+    #[test]
+    fn export_session_text_needs_replace_to_overwrite() {
+        let dir = std::env::temp_dir().join(format!("sc-export-text-replace-{}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&dir);
+        std::fs::create_dir_all(&dir).unwrap();
+        let path = dir.join("info.txt");
+        let path_str = path.to_string_lossy().into_owned();
+        let mut e = Engine::default();
+        e.execute("file.export_session_text", &json!({"path": path_str})).unwrap();
+        std::fs::write(&path, "keep me").unwrap();
+        let err = e.execute("file.export_session_text", &json!({"path": path_str})).unwrap_err();
+        assert!(err.to_string().contains("replace: true"), "{err}");
+        assert_eq!(std::fs::read_to_string(&path).unwrap(), "keep me");
+        e.execute("file.export_session_text", &json!({"path": path_str, "replace": true})).unwrap();
+        assert_ne!(std::fs::read_to_string(&path).unwrap(), "keep me");
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+
     #[test]
     fn import_audio_honours_new_tracks() {
         let dir = std::env::temp_dir().join(format!("sc-import-new-tracks-{}", std::process::id()));

crates/engine/src/io.rs

@@ -1109,7 +1109,7 @@ pub fn replaces(e: &Engine, command: &str, file: &Path) -> bool {
         "session.save" | "session.save_as" | "session.save_copy" => {
             file.exists() && !e.path.as_deref().is_some_and(|own| same_path(Path::new(own), file))
         }
-        "session.save_template" | "file.export_selected_tracks_as_session" => file.exists(),
+        "session.save_template" | "file.export_selected_tracks_as_session" | "file.export_session_text" => file.exists(),
         _ => false,
     }
 }